Sexual Health: Can I get pregnant during my period?

Can I get pregnant during my period?

There's a small risk — especially if your cycle tends to be short, meaning you menstruate every 21 to 22 days instead of the average 28, says Lynn Borgatta, M.D., a professor in the department of obstetrics and gynecology at the Boston University School of Medicine. Here's why: "Most sperm can live for four to five days," explains Dr. Borgatta. "Usually, you ovulate about two weeks after your period starts, long after sperm are dead. But in a short cycle, you may ovulate only a few days after your period ends, while sperm are still alive -- making fertilization possible." The bottom line: If you're going to have sex during your period and you're not on the Pill, use protection such as condoms.